# Onshape 3D CAD vs CatGrab

The clearest difference is in-app purchases: Onshape 3D CAD at none against CatGrab's 1. Onshape 3D CAD also leads on ads (none vs shown). CatGrab's advantage is update cadence (every 8 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. CatGrab sells 1 one-off in-app purchase. Onshape 3D CAD asks for nothing beyond the download.

Onshape 3D CAD ships an update every 3 weeks, CatGrab every 8 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Onshape 3D CAD | CatGrab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (417 ratings)](https://appshunter.io/ios/app/onshape-3d-cad/id923421284/reviews)** | — |
| Number of ratings | **417** | — |
| Positive reviews | 47.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | — |
| Size | 77 MB | 15 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PTC Inc.](https://appshunter.io/developer/501201404) | [少新 蔡](https://appshunter.io/developer/6776052428) |

## What reviewers say

### Onshape 3D CAD

[App page](https://appshunter.io/ios/app/onshape-3d-cad/id923421284)

A cloud-based 3D CAD platform for professional users to create, edit, and collaborate on designs in real-time from any device. It offers robust parametric modeling tools and seamless data management for teams.

**Highlights:** Real-time collaboration, Parametric modeling tools, Cloud-based data management, Cross-device accessibility, Integrated commenting, Version control

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful CAD features
- 🌐 Accessible from any device
- 👍 Intuitive interface
- 💡 Great for on-site work
- 🌟 Exceptional for a free app

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 👎 Unintuitive and clunky UI
- 🔒 Requires account sign-up
- 💰 Expensive paid plans
- 🔍 Difficult to find/use key features

**Reported bugs**

- Frequent crashes and freezes
- Dimensions not visible/editable
- Rotation/view controls unreliable
- Unable to create account
- Incompatible with older devices

**Requested features**

- Add keyboard shortcuts
- Improve dimensioning tools
- Allow private file storage
- Optimize for iPad/Apple Pencil
- Provide better documentation/tutorials


### CatGrab

[App page](https://appshunter.io/ios/app/catgrab/id6804103134)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $2.99 | one-time |


## Frequently asked questions

### Is Onshape 3D CAD free?

Onshape 3D CAD is free to download, with no in-app purchases.

### Is CatGrab free?

CatGrab is free to download, with in-app purchases available.

### Do Onshape 3D CAD or CatGrab have ads?

CatGrab shows ads; Onshape 3D CAD does not.

### Which is updated more often, Onshape 3D CAD or CatGrab?

Onshape 3D CAD ships an update every 3 weeks, and CatGrab every 8 days. Most recently, Onshape 3D CAD was updated on November 1, 2026 and CatGrab on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*